Last visit was: 23 Jul 2024, 13:35 It is currently 23 Jul 2024, 13:35
Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
SORT BY:
Date
Math Expert
Joined: 02 Sep 2009
Posts: 94589
Own Kudos [?]: 643354 [3]
Given Kudos: 86728
Send PM
GMAT Club Legend
GMAT Club Legend
Joined: 18 Aug 2017
Status:You learn more from failure than from success.
Posts: 8010
Own Kudos [?]: 4252 [0]
Given Kudos: 243
Location: India
Concentration: Sustainability, Marketing
GMAT Focus 1:
545 Q79 V79 DI73
GPA: 4
WE:Marketing (Energy and Utilities)
Send PM
Intern
Intern
Joined: 23 Jun 2018
Posts: 26
Own Kudos [?]: 24 [0]
Given Kudos: 147
Location: India
Concentration: Finance, Leadership
WE:Sales (Mutual Funds and Brokerage)
Send PM
GMAT Club Legend
GMAT Club Legend
Joined: 18 Aug 2017
Status:You learn more from failure than from success.
Posts: 8010
Own Kudos [?]: 4252 [0]
Given Kudos: 243
Location: India
Concentration: Sustainability, Marketing
GMAT Focus 1:
545 Q79 V79 DI73
GPA: 4
WE:Marketing (Energy and Utilities)
Send PM
Re: The average weight of 36 students in a class is 62 kgs. If the weight [#permalink]
Bunuel wrote:
The average weight of 36students in a class is 62 kgs. If the weight of the teacher is also included the average becomes 62.5 kgs. Find the weight of the teacher.

A. 80
B. 80.25
C. 80.5
D. 80.75
E. 81



36*62+x = 62.5* 37
x = 80.5
IMO C
Target Test Prep Representative
Joined: 14 Oct 2015
Status:Founder & CEO
Affiliations: Target Test Prep
Posts: 19185
Own Kudos [?]: 22704 [0]
Given Kudos: 286
Location: United States (CA)
Send PM
Re: The average weight of 36 students in a class is 62 kgs. If the weight [#permalink]
Expert Reply
Bunuel wrote:
The average weight of 36 students in a class is 62 kgs. If the weight of the teacher is also included the average becomes 62.5 kgs. Find the weight of the teacher.

A. 80
B. 80.25
C. 80.5
D. 80.75
E. 81


We can let n = the weight of the teacher and create the equation:

(36 x 62 + n)/37 = 62.5

2232 + n = 2,312.5

n = 80.5

Answer: C
Manager
Manager
Joined: 24 Mar 2015
Status:love the club...
Posts: 217
Own Kudos [?]: 112 [1]
Given Kudos: 527
Send PM
Re: The average weight of 36 students in a class is 62 kgs. If the weight [#permalink]
1
Kudos
Bunuel wrote:
The average weight of 36 students in a class is 62 kgs. If the weight of the teacher is also included the average becomes 62.5 kgs. Find the weight of the teacher.

A. 80
B. 80.25
C. 80.5
D. 80.75
E. 81



average increases form 62 to 62.5, so 0.5

total increase = 37 * .5 = 18.5

weight of the teacher= 62 + 18.5 = 80.5 = C the answer

thanks
User avatar
Non-Human User
Joined: 09 Sep 2013
Posts: 34047
Own Kudos [?]: 853 [0]
Given Kudos: 0
Send PM
Re: The average weight of 36 students in a class is 62 kgs. If the weight [#permalink]
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
Re: The average weight of 36 students in a class is 62 kgs. If the weight [#permalink]
Moderator:
Math Expert
94589 posts